Gastric bypass surgical procedures (in English only)

When humans eat, the food passes down the gullet (oesophagus) to the
stomach, then on to the duodenum, and then on to the small intestine,
and from here to the large intestine (colon).

Gastric bypass surgery divides the stomach into two parts; a
smaller and a larger part. The smaller upper part of the stomach is
connected with the small intestine.

The food will then pass from the gullet to the small stomach and
then directly to the small intestine. The remainder of the stomach,
which is still connected to the small intestine, produces pancreatic
fluids which are released further down the small intestine.